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  #pragma once
  #ifndef MATH_TRANSFORM44_H
  #define MATH_TRANSFORM44_H
  //------------------------------------------------------------------------------
  /**
      @class Math::transform44
  
      A 4x4 matrix which is described by translation, rotation and scale.
  */
  #include "math/matrix44.h"
  #include "math/vector.h"
  #include "math/point.h"
  #include "math/quaternion.h"
  
  //------------------------------------------------------------------------------
  namespace Math
  {
  class transform44
  {
  public:
      /// constructor
      transform44();
      /// set position
      void setposition(const point& p);
      /// get position
      const point& getposition() const;
      /// set rotate
      void setrotate(const quaternion& r);
      /// get rotate
      const quaternion& getrotate() const;
      /// set scale
      void setscale(const vector& s);
      /// get scale
      const vector& getscale() const;
      /// set optional rotate pivot
      void setrotatepivot(const point& p);
      /// get optional rotate pivot
      const point& getrotatepivot() const;
      /// set optional scale pivot
      void setscalepivot(const point& p);
      /// get optional scale pivot
      const point& getscalepivot() const;
      /// set optional offset matrix
      void setoffset(const matrix44& m);
      /// get optional offset matrix
      const matrix44& getoffset() const;
      /// return true if the transformation matrix is dirty
      bool isdirty() const;
  
  private:
      point position;
      quaternion rotate;
      vector scale;
      point rotatePivot;
      point scalePivot;
      matrix44 offset;
      matrix44 matrix;
      bool isDirty;
      bool offsetValid;
  };
  
  //------------------------------------------------------------------------------
  /**
  */
  inline
  transform44::transform44() :
      position(0.0f, 0.0f, 0.0f),
      rotate(0.0f, 0.0f, 0.0f, 1.0f),
      scale(1.0f, 1.0f, 1.0f),
      rotatePivot(0.0f, 0.0f, 0.0f),
      scalePivot(0.0f, 0.0f, 0.0f),
      offset(matrix44::identity()),
      isDirty(false),
      offsetValid(false)
  {
      // empty
  }
  
  //------------------------------------------------------------------------------
  /**
  */
  inline void
  transform44::setposition(const point& p)
  {
      this->position = p;
      this->isDirty = true;
  }
  
  //------------------------------------------------------------------------------
  /**
  */
  inline const point&
  transform44::getposition() const
  {
      return this->position;
  }
  
  //------------------------------------------------------------------------------
  /**
  */
  inline void
  transform44::setrotate(const quaternion& r)
  {
      this->rotate = r;
      this->isDirty = true;
  }
  
  //------------------------------------------------------------------------------
  /**
  */
  inline const quaternion&
  transform44::getrotate() const
  {
      return this->rotate;
  }
  
  //------------------------------------------------------------------------------
  /**
  */
  inline void
  transform44::setscale(const vector& s)
  {
      this->scale = s;
      this->isDirty = true;
  }
  
  //------------------------------------------------------------------------------
  /**
  */
  inline const vector&
  transform44::getscale() const
  {
      return this->scale;
  }
  
  //------------------------------------------------------------------------------
  /**
  */
  inline void
  transform44::setrotatepivot(const point& p)
  {
  	this->rotatePivot = p;
      this->isDirty = true;
  }
  
  //------------------------------------------------------------------------------
  /**
  */
  inline const point& 
  transform44::getrotatepivot() const
  {
      return this->rotatePivot;
  }
  
  //------------------------------------------------------------------------------
  /**
  */
  inline void
  transform44::setscalepivot(const point& p)
  {
      this->scalePivot = p;
      this->isDirty = true;
  }
  
  //------------------------------------------------------------------------------
  /**
  */
  inline const point&
  transform44::getscalepivot() const
  {
      return this->scalePivot;
  }
  
  //------------------------------------------------------------------------------
  /**
  */
  inline void
  transform44::setoffset(const matrix44& m)
  {
      this->offset = m;
      this->offsetValid = true;
      this->isDirty = true;
  }
  
  //------------------------------------------------------------------------------
  /**
  */
  inline const matrix44&
  transform44::getoffset() const
  {
      return this->offset;
  }
  
  //------------------------------------------------------------------------------
  /**
  */
  inline bool
  transform44::isdirty() const
  {
      return this->isDirty;
  }
  
  } // namespace Math
  //------------------------------------------------------------------------------
  #endif
  
      
      